Valve.



J; NOLAN.

v VALVE.

APPLIGATIONVPILED 11011.28, 190e.

1,014,168, y .4* Patented Jan.9,1912.

WITNESSES Q INVENTOI? ZM/f. aa/ly N WWQQW mam gw JOHNSTON NOLAN, OFPHILADELPHIA, PENNSYLVANIA.

VALVE.

Specication of Letters Patent.

Patented Jan. 9, 1912.

Application filed November 28, 1906. Serial No. 345,527.

To all 'whom it may concern:

Be it known that I, JOHNSTON NOLAN, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have inventedy certain new and useful Improvements in.

Valves, of which the following is a specification.

This invention relates to valves and particularly to that class ofvalves known as blow 0E valves, for steam boilers. The .object of theinvention is to provide a valve of simple and efcient constructionwhereby the steam or other fluid may be eii'ectually shut off, and afurther object of the inventionv is to provide for the adjustment of theparts when they become worn, all as will be hereinafter fully describedand particularly pointed out in the claims.

In the drawings Figure 1 is a. longitudinal section through a valveembodying my invention, showing the valve closed. Fig. 2 is a transversesection thereof, as on the line 2-2 of Fig; 1, showing the valve open.Fig.'3 is a transverse section, as on the line 3-3, of Fig. 1.v Fig. 4is a transverse section as on theline 4-4 of Fig. 1.

4 designates a cylindrical casing having lateral openings 5 therein,constituting the inlet and .outlet passageways of the valve. One end ofthe casing 4 is closed by a head 6, and the interior of the casing isprovided with a suitable bushing 7 Fitted to the interior of the casing,is a piston 8, comprising a body portion 9, having` a flange 10 on oneof its ends, and a stem 11 projecting from the other of its ends;collars 12 and 13 surrounding the body portion 9, and having rings 14and 15 between theI collars 12 and 13 and the collar 13 and flange 10,respectively. The width of the lateral openings 5 in cross sectionalarea as shown in Fig. 2, is less than the diameter of the Casin 4, tothe end that when the piston is move to the position shown in Fig. 1,the packing 14 will engage the interior of the casing 4 all around theopenings 5, and thus effectually prevent the passage of pressure fluidfrom one opening into the other.

Extending transversely through the body 9 of the piston and the collar13 surrounding the same, is an opening 16 substantially equal in area tothe area of the opening', whereby, when the piston is moved in thedirection indicated by the arrow, the open- Ving 16 may be brought intoregister with the openings 5, and thus open the valve by effecting acommunication between the openings 5.

. Thelstem 11' is screw-threaded, and extends outwardly, and isslidingly tted to an opening in a boss extending from the end head 6.Screwed on to the outer end of the stem 11 is a hub 18, of a suitablehand wheel 19. The inner end of the hub' 18 is provided with a flange 20in engagement with a flange 21 on the outer end of the boss 17; and surfrounding the hub 18 and boss 17, is a collar 22,v provided on itsinterior with a circumferential groove to 4 which arev fittedztheflanges 20 and 21, thus permitting the wheel 19 to be rotatedand-preventing its movement longitudinally of the stem 11. In 0rder toprevent the rotation of the stemvll during the rotation of the wheel 19,I provide a key 28 secured to the boss 17, and adapted to slide within agroove in the stem l1.' By the construction just described it will beseen that by rotatingthehand wheel 19 the piston 8 may be movedlongitudinally within the casing4 to bring either the opening 16 orpacking 14 into register with the openings 5, and thus effect theopening or closing of the valve as described. Thehead 6 is providedwitha vent passage 29 to permit the ingress and egress of air to andfrom the interior of the adjacent end of the casing 4 during themovement of the piston 8 therein. The stem 11 is provided with alongitudinal groove therein l,into which extends a key 28 projectingfrom the boss 17, to prevent rotationof the piston 8 with the rotationof the hand wheel 19, and insure the registry of the opening 16 with theopenings 5. The collars 12y and 13 and the packing rings 14 and 15 arelongitudinally movable on. the 'body 9 of the piston 8;

provide the following The body of the piston is provided withrtransverse slots 23 through which extends a block 24 having its endsengaged with the collar 12. Bearing against the block 24 is the innerreduced end of ay rod 25, extending outwardly through the rod may beturned.

the stem 11. The inner end of therod25l is slidingly fitted to the stemA11, andthe Vouter enlarged'end 26 of the rod is screw `threaded andscrewed into the outer end of s the-stem`117 whereby; when the rod 25is.

turned, it will engage the block 24 and force the collar 12 toward theflange 10, and thus leffect the adjustment of the packing rings 14: and15. 'Ihe outer end of the rod 25 is` provided with a nut 27; by meansof'which I claim I y 1. In a valve, the combination of a cylindricalcasing having an outlet opening and l a lateral inlet opening therein; acylindrical j piston within the casing having an opening Vthereinaifording' communication between said inlet opening and said 4outletopening when the piston opening is inregi'stry with said inlet opening;packing surrounding the piston'on one side of the ypiston opening andengaging the piston and the'ca'sing on both sides of 'said inletopeningwhen the piston opening yis out-of registry with ythe inletopening.; packing surrounding'the piston on the other side of the pistonopening and engaging the piston and the casing; a ring separating vtherst named packing from the second named packing; and means for movingthe piston.

2. AIn a valve, the combination of a cylindrical vcasing having anoutlet opening and a lateral inlet opening therein; a cylindrical pistonvwithin the casing having an opening therein' affording communicationbetween said inlet opening and said outlet opening Y when the pistonopening is in registry with said inlet opening; a ring fixed to thepiston and surrounding the same adjacent one end thereof; a ringsurrounding the piston adjacent the 'other end thereof and movablethereon toward the first named ring; an

" inner ring surrounding the piston and movable-'thereon between thefirst and second namedrings, said innerring having an opening therein inregistry with'f'the piston openp ing; packing surrounding the pistonbetween said Ainner ringand the first named ring; packing surroundingthe piston between said inner ring and the second named ring; means foradjusting the rst and second` named rings toward each other; and meansfor moving the piston.v Y

3. Ina valve, the combination of a cylindrical casing having an outletopening Vand al lateral inlet opening therein; ya cylindrical pistonwithin the casing and having an iopening therein affording communicationbetween said inlet opening and said outlet opening when the pistonopening is in registry with said inlet opening;'apacking ringsurrounding the piston and engaged therewithjand with said casing on oneside of said inlet opening when the piston opening is'in' registrywith-said inlet opening ;-a packing ring surrounding the piston` andengaged therewith and with said casing on the other side of said inletopening when the piston opening is in registry with said inlet open-Ving; a stem projecting from the piston;

means coperatingvwith the stem for moving the piston longitudinallywithin the casing; a rod extending through the stem; and meansassociated with said rod for adjusting the packing Y i 4. Ina valve, thecombination of a cylindrical casing having an outlet' opening and alateral inlet opening therein; a cylindrical 4piston within vthe casingand having 'an 'opening therein affording 'communication between saidinlet opening and said outlet opening when the piston opening isin'registry with said inlet opening; packing surrounding thek piston onone'side ofthe 'piston 'opening and engaging the piston and the-"casingon both sides of said 'inlet opening when the piston opening is out ofregistry with ythe inlet opening; packing surrounding the piston on theother sidey of the piston opening and engaging'the piston and thecasing; a stem projecting from the piston ;'means cooperating with thestern for moving the piston longitudinally v within the casing; a rodextending through the stein;

and means associated with said rod for adj usting the packing.

5. In a -valve the combination of a cylin-` drical casing having:Y a'lateral inletopening and a lateral outlet opening therein, a pistonwithin the' casing and having'an opening movable in to andoutofregister'with said inlet and outlet openings; a ring surround-Y ingthe piston and having'an opening therein in register with the pistonopening, vpacking rings surrounding the piston on each side of the firstnamed ring, meansfor'adjusting the packingrings7 and means for moving uthrough said stem and engaging said block;

and means coperatingwith the stem for adjustingthe piston. j Y

7. In a valve, the combination of a `'cylindrical casing having alateral inlet opening and a lateral outlet opening therein; a pistonwithin the easing and comprising a slotted,V

cylindrical body portionhaving a flange on its forward end; a stemprojecting from its rearward end, and an'adjustable ring onits rearwardend; packing members surroundcoperating with the. stem for adjusting theing said body portion between said flange piston.

and said ring, ,a transverse block extending .In testimony whereof I aixmy signature through the slotted body portion of the pisin presence oftwo witnesses.

ton and engaging said ring, an adjustable JOHNSTON NOLAN. rod extendingthrough said stem and engag- Witnesses:

ing said block, said rod being provided with ELLA M. WARE,

screw-threads engaging said stem, and means A. V. GROUPE.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner 'of Patents. Washington, D. C.

